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<head><meta charset="utf-8"><title>plan to test parallel rustc · t-compiler/wg-parallel-rustc · Zulip Chat Archive</title></head>
<h2>Stream: <a href="https://rust-lang.github.io/zulip_archive/stream/187679-t-compiler/wg-parallel-rustc/index.html">t-compiler/wg-parallel-rustc</a></h2>
<h3>Topic: <a href="https://rust-lang.github.io/zulip_archive/stream/187679-t-compiler/wg-parallel-rustc/topic/plan.20to.20test.20parallel.20rustc.html">plan to test parallel rustc</a></h3>

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<a name="183590896"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/187679-t-compiler/wg-parallel-rustc/topic/plan%20to%20test%20parallel%20rustc/near/183590896" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> Alex Crichton <a href="https://rust-lang.github.io/zulip_archive/stream/187679-t-compiler/wg-parallel-rustc/topic/plan.20to.20test.20parallel.20rustc.html#183590896">(Dec 16 2019 at 21:09)</a>:</h4>
<p>I've posted this online now -- <a href="https://internals.rust-lang.org/t/plan-to-test-parallel-rustc/11487" target="_blank" title="https://internals.rust-lang.org/t/plan-to-test-parallel-rustc/11487">https://internals.rust-lang.org/t/plan-to-test-parallel-rustc/11487</a></p>



<a name="183590911"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/187679-t-compiler/wg-parallel-rustc/topic/plan%20to%20test%20parallel%20rustc/near/183590911" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> Alex Crichton <a href="https://rust-lang.github.io/zulip_archive/stream/187679-t-compiler/wg-parallel-rustc/topic/plan.20to.20test.20parallel.20rustc.html#183590911">(Dec 16 2019 at 21:09)</a>:</h4>
<p>we can discuss feedback here if there is any! (or on thread if it's more appropriate)</p>



<a name="183592133"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/187679-t-compiler/wg-parallel-rustc/topic/plan%20to%20test%20parallel%20rustc/near/183592133" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> Santiago Pastorino <a href="https://rust-lang.github.io/zulip_archive/stream/187679-t-compiler/wg-parallel-rustc/topic/plan.20to.20test.20parallel.20rustc.html#183592133">(Dec 16 2019 at 21:21)</a>:</h4>
<p>one thing that I'm thinking of are potential clippy, miri and things like that breakages that if you have those and try to do rustup update you may not escape for a while from the parallel version that was built</p>



<a name="183592185"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/187679-t-compiler/wg-parallel-rustc/topic/plan%20to%20test%20parallel%20rustc/near/183592185" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> Santiago Pastorino <a href="https://rust-lang.github.io/zulip_archive/stream/187679-t-compiler/wg-parallel-rustc/topic/plan.20to.20test.20parallel.20rustc.html#183592185">(Dec 16 2019 at 21:22)</a>:</h4>
<p>I think that's ok anyway ...</p>



<a name="183592212"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/187679-t-compiler/wg-parallel-rustc/topic/plan%20to%20test%20parallel%20rustc/near/183592212" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> nikomatsakis <a href="https://rust-lang.github.io/zulip_archive/stream/187679-t-compiler/wg-parallel-rustc/topic/plan.20to.20test.20parallel.20rustc.html#183592212">(Dec 16 2019 at 21:22)</a>:</h4>
<p>I guess plausibly downstream toolstate might die pretty badly</p>



<a name="183592224"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/187679-t-compiler/wg-parallel-rustc/topic/plan%20to%20test%20parallel%20rustc/near/183592224" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> nikomatsakis <a href="https://rust-lang.github.io/zulip_archive/stream/187679-t-compiler/wg-parallel-rustc/topic/plan.20to.20test.20parallel.20rustc.html#183592224">(Dec 16 2019 at 21:22)</a>:</h4>
<p>though I'm not sure how</p>



<a name="183592251"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/187679-t-compiler/wg-parallel-rustc/topic/plan%20to%20test%20parallel%20rustc/near/183592251" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> nikomatsakis <a href="https://rust-lang.github.io/zulip_archive/stream/187679-t-compiler/wg-parallel-rustc/topic/plan.20to.20test.20parallel.20rustc.html#183592251">(Dec 16 2019 at 21:22)</a>:</h4>
<p>not sure if we can test that in advance? i.e., if clippy does something not thread safe?</p>



<a name="183592265"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/187679-t-compiler/wg-parallel-rustc/topic/plan%20to%20test%20parallel%20rustc/near/183592265" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> nikomatsakis <a href="https://rust-lang.github.io/zulip_archive/stream/187679-t-compiler/wg-parallel-rustc/topic/plan.20to.20test.20parallel.20rustc.html#183592265">(Dec 16 2019 at 21:23)</a>:</h4>
<p>(do standard PR builds or try builds test tools?)</p>



<a name="183592369"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/187679-t-compiler/wg-parallel-rustc/topic/plan%20to%20test%20parallel%20rustc/near/183592369" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> Santiago Pastorino <a href="https://rust-lang.github.io/zulip_archive/stream/187679-t-compiler/wg-parallel-rustc/topic/plan.20to.20test.20parallel.20rustc.html#183592369">(Dec 16 2019 at 21:24)</a>:</h4>
<p>just in case, I was referring to the time window between the nightly with parallel enabled goes out and the next nightly version</p>



<a name="183592382"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/187679-t-compiler/wg-parallel-rustc/topic/plan%20to%20test%20parallel%20rustc/near/183592382" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> Santiago Pastorino <a href="https://rust-lang.github.io/zulip_archive/stream/187679-t-compiler/wg-parallel-rustc/topic/plan.20to.20test.20parallel.20rustc.html#183592382">(Dec 16 2019 at 21:24)</a>:</h4>
<p>if between those a change that breaks miri, clippy or any of the other components lands</p>



<a name="183592396"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/187679-t-compiler/wg-parallel-rustc/topic/plan%20to%20test%20parallel%20rustc/near/183592396" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> Santiago Pastorino <a href="https://rust-lang.github.io/zulip_archive/stream/187679-t-compiler/wg-parallel-rustc/topic/plan.20to.20test.20parallel.20rustc.html#183592396">(Dec 16 2019 at 21:24)</a>:</h4>
<p>you may not escape the parallel nightly for a while unless you do "something"</p>



<a name="183592543"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/187679-t-compiler/wg-parallel-rustc/topic/plan%20to%20test%20parallel%20rustc/near/183592543" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> Santiago Pastorino <a href="https://rust-lang.github.io/zulip_archive/stream/187679-t-compiler/wg-parallel-rustc/topic/plan.20to.20test.20parallel.20rustc.html#183592543">(Dec 16 2019 at 21:26)</a>:</h4>
<p>but just a <code>rustup update</code> won't allow you to update because next versions will have a broken component</p>



<a name="183592876"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/187679-t-compiler/wg-parallel-rustc/topic/plan%20to%20test%20parallel%20rustc/near/183592876" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> simulacrum <a href="https://rust-lang.github.io/zulip_archive/stream/187679-t-compiler/wg-parallel-rustc/topic/plan.20to.20test.20parallel.20rustc.html#183592876">(Dec 16 2019 at 21:30)</a>:</h4>
<p>the advantage to doing it this week is that all tools must build (modulo miri)</p>



<a name="183592880"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/187679-t-compiler/wg-parallel-rustc/topic/plan%20to%20test%20parallel%20rustc/near/183592880" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> simulacrum <a href="https://rust-lang.github.io/zulip_archive/stream/187679-t-compiler/wg-parallel-rustc/topic/plan.20to.20test.20parallel.20rustc.html#183592880">(Dec 16 2019 at 21:30)</a>:</h4>
<p>since it's beta week</p>



<a name="183592941"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/187679-t-compiler/wg-parallel-rustc/topic/plan%20to%20test%20parallel%20rustc/near/183592941" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> Santiago Pastorino <a href="https://rust-lang.github.io/zulip_archive/stream/187679-t-compiler/wg-parallel-rustc/topic/plan.20to.20test.20parallel.20rustc.html#183592941">(Dec 16 2019 at 21:31)</a>:</h4>
<p><span aria-label="+1" class="emoji emoji-1f44d" role="img" title="+1">:+1:</span></p>



<a name="183623991"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/187679-t-compiler/wg-parallel-rustc/topic/plan%20to%20test%20parallel%20rustc/near/183623991" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> Zoxc <a href="https://rust-lang.github.io/zulip_archive/stream/187679-t-compiler/wg-parallel-rustc/topic/plan.20to.20test.20parallel.20rustc.html#183623991">(Dec 17 2019 at 07:19)</a>:</h4>
<p>Have you checked that parallel compiler passes tests? I know there was one test where the single thread compiler outputs an extra cycle error.</p>



<a name="183643787"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/187679-t-compiler/wg-parallel-rustc/topic/plan%20to%20test%20parallel%20rustc/near/183643787" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> simulacrum <a href="https://rust-lang.github.io/zulip_archive/stream/187679-t-compiler/wg-parallel-rustc/topic/plan.20to.20test.20parallel.20rustc.html#183643787">(Dec 17 2019 at 12:33)</a>:</h4>
<p>hm, we're seeing the opposite</p>



<a name="183643845"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/187679-t-compiler/wg-parallel-rustc/topic/plan%20to%20test%20parallel%20rustc/near/183643845" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> simulacrum <a href="https://rust-lang.github.io/zulip_archive/stream/187679-t-compiler/wg-parallel-rustc/topic/plan.20to.20test.20parallel.20rustc.html#183643845">(Dec 17 2019 at 12:34)</a>:</h4>
<p>i.e., one less cycle failure with parallel</p>



<a name="183644121"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/187679-t-compiler/wg-parallel-rustc/topic/plan%20to%20test%20parallel%20rustc/near/183644121" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> Zoxc <a href="https://rust-lang.github.io/zulip_archive/stream/187679-t-compiler/wg-parallel-rustc/topic/plan.20to.20test.20parallel.20rustc.html#183644121">(Dec 17 2019 at 12:38)</a>:</h4>
<p>That sounds like the same thing =P</p>



<a name="183644715"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/187679-t-compiler/wg-parallel-rustc/topic/plan%20to%20test%20parallel%20rustc/near/183644715" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> simulacrum <a href="https://rust-lang.github.io/zulip_archive/stream/187679-t-compiler/wg-parallel-rustc/topic/plan.20to.20test.20parallel.20rustc.html#183644715">(Dec 17 2019 at 12:49)</a>:</h4>
<p>oh I completely missed the "single threaded" bit</p>



<a name="183685046"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/187679-t-compiler/wg-parallel-rustc/topic/plan%20to%20test%20parallel%20rustc/near/183685046" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> nikomatsakis <a href="https://rust-lang.github.io/zulip_archive/stream/187679-t-compiler/wg-parallel-rustc/topic/plan.20to.20test.20parallel.20rustc.html#183685046">(Dec 17 2019 at 19:55)</a>:</h4>
<p>Seems like a concern :)</p>



<a name="183695649"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/187679-t-compiler/wg-parallel-rustc/topic/plan%20to%20test%20parallel%20rustc/near/183695649" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> Alex Crichton <a href="https://rust-lang.github.io/zulip_archive/stream/187679-t-compiler/wg-parallel-rustc/topic/plan.20to.20test.20parallel.20rustc.html#183695649">(Dec 17 2019 at 21:50)</a>:</h4>
<p>parallelism was enabled in <a href="https://github.com/rust-lang/rust/pull/67362" target="_blank" title="https://github.com/rust-lang/rust/pull/67362">https://github.com/rust-lang/rust/pull/67362</a> and is being disabled in <a href="https://github.com/rust-lang/rust/pull/67379" target="_blank" title="https://github.com/rust-lang/rust/pull/67379">https://github.com/rust-lang/rust/pull/67379</a></p>



<a name="183695658"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/187679-t-compiler/wg-parallel-rustc/topic/plan%20to%20test%20parallel%20rustc/near/183695658" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> Alex Crichton <a href="https://rust-lang.github.io/zulip_archive/stream/187679-t-compiler/wg-parallel-rustc/topic/plan.20to.20test.20parallel.20rustc.html#183695658">(Dec 17 2019 at 21:50)</a>:</h4>
<p><span class="user-mention" data-user-id="116122">@simulacrum</span> I assume you've got a method in mind of how to land that while making sure the previous PR makes its way into nightlie?</p>



<a name="183695705"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/187679-t-compiler/wg-parallel-rustc/topic/plan%20to%20test%20parallel%20rustc/near/183695705" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> simulacrum <a href="https://rust-lang.github.io/zulip_archive/stream/187679-t-compiler/wg-parallel-rustc/topic/plan.20to.20test.20parallel.20rustc.html#183695705">(Dec 17 2019 at 21:51)</a>:</h4>
<p>we're less than 4 hours out from nightly "fork" and the rollup won't start testing for at least an hour or two, so it's pretty much guaranteed that everything sync up appropriately</p>



<a name="183703304"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/187679-t-compiler/wg-parallel-rustc/topic/plan%20to%20test%20parallel%20rustc/near/183703304" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> Zoxc <a href="https://rust-lang.github.io/zulip_archive/stream/187679-t-compiler/wg-parallel-rustc/topic/plan.20to.20test.20parallel.20rustc.html#183703304">(Dec 17 2019 at 23:26)</a>:</h4>
<p><span class="user-mention" data-user-id="116009">@nikomatsakis</span> It could just be that the parallel compiler chooses to break the cycle in a location it can't be recovered from. Recovering from cycles is really questionable in general and it's probably not something we should do.</p>



<a name="183760624"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/187679-t-compiler/wg-parallel-rustc/topic/plan%20to%20test%20parallel%20rustc/near/183760624" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> nikomatsakis <a href="https://rust-lang.github.io/zulip_archive/stream/187679-t-compiler/wg-parallel-rustc/topic/plan.20to.20test.20parallel.20rustc.html#183760624">(Dec 18 2019 at 15:37)</a>:</h4>
<p>anyway I don't think it has to block doing some experiments w/ nightly</p>



<a name="183760640"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/187679-t-compiler/wg-parallel-rustc/topic/plan%20to%20test%20parallel%20rustc/near/183760640" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> nikomatsakis <a href="https://rust-lang.github.io/zulip_archive/stream/187679-t-compiler/wg-parallel-rustc/topic/plan.20to.20test.20parallel.20rustc.html#183760640">(Dec 18 2019 at 15:37)</a>:</h4>
<p>but we should file an issue to investigate or something at least?</p>



<a name="183761596"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/187679-t-compiler/wg-parallel-rustc/topic/plan%20to%20test%20parallel%20rustc/near/183761596" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> simulacrum <a href="https://rust-lang.github.io/zulip_archive/stream/187679-t-compiler/wg-parallel-rustc/topic/plan.20to.20test.20parallel.20rustc.html#183761596">(Dec 18 2019 at 15:47)</a>:</h4>
<p>yeah I think an issue would be good</p>



<a name="183767267"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/187679-t-compiler/wg-parallel-rustc/topic/plan%20to%20test%20parallel%20rustc/near/183767267" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> Alex Crichton <a href="https://rust-lang.github.io/zulip_archive/stream/187679-t-compiler/wg-parallel-rustc/topic/plan.20to.20test.20parallel.20rustc.html#183767267">(Dec 18 2019 at 16:44)</a>:</h4>
<p>I've posted a dedicated thread -- <a href="https://internals.rust-lang.org/t/help-test-parallel-rustc/11503" target="_blank" title="https://internals.rust-lang.org/t/help-test-parallel-rustc/11503">https://internals.rust-lang.org/t/help-test-parallel-rustc/11503</a> -- for gathing measurements now</p>



<a name="183767279"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/187679-t-compiler/wg-parallel-rustc/topic/plan%20to%20test%20parallel%20rustc/near/183767279" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> Alex Crichton <a href="https://rust-lang.github.io/zulip_archive/stream/187679-t-compiler/wg-parallel-rustc/topic/plan.20to.20test.20parallel.20rustc.html#183767279">(Dec 18 2019 at 16:44)</a>:</h4>
<p><span class="user-mention" data-user-id="116122">@simulacrum</span> I see the revert already landed, thanks for managing that!</p>



<a name="183767359"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/187679-t-compiler/wg-parallel-rustc/topic/plan%20to%20test%20parallel%20rustc/near/183767359" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> simulacrum <a href="https://rust-lang.github.io/zulip_archive/stream/187679-t-compiler/wg-parallel-rustc/topic/plan.20to.20test.20parallel.20rustc.html#183767359">(Dec 18 2019 at 16:45)</a>:</h4>
<p>Yep tonight's nightly should be back to normal</p>



<a name="183778831"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/187679-t-compiler/wg-parallel-rustc/topic/plan%20to%20test%20parallel%20rustc/near/183778831" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> Santiago Pastorino <a href="https://rust-lang.github.io/zulip_archive/stream/187679-t-compiler/wg-parallel-rustc/topic/plan.20to.20test.20parallel.20rustc.html#183778831">(Dec 18 2019 at 18:51)</a>:</h4>
<p>I was wondering what rayon did we ship the parallel version with</p>



<a name="183778859"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/187679-t-compiler/wg-parallel-rustc/topic/plan%20to%20test%20parallel%20rustc/near/183778859" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> Santiago Pastorino <a href="https://rust-lang.github.io/zulip_archive/stream/187679-t-compiler/wg-parallel-rustc/topic/plan.20to.20test.20parallel.20rustc.html#183778859">(Dec 18 2019 at 18:51)</a>:</h4>
<p>it seems like it was master's <code>rust-lang/rustc-rayon</code>, right?</p>



<a name="183778885"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/187679-t-compiler/wg-parallel-rustc/topic/plan%20to%20test%20parallel%20rustc/near/183778885" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> Santiago Pastorino <a href="https://rust-lang.github.io/zulip_archive/stream/187679-t-compiler/wg-parallel-rustc/topic/plan.20to.20test.20parallel.20rustc.html#183778885">(Dec 18 2019 at 18:51)</a>:</h4>
<p>didn't we want to use Niko's fork?</p>



<a name="183779726"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/187679-t-compiler/wg-parallel-rustc/topic/plan%20to%20test%20parallel%20rustc/near/183779726" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> simulacrum <a href="https://rust-lang.github.io/zulip_archive/stream/187679-t-compiler/wg-parallel-rustc/topic/plan.20to.20test.20parallel.20rustc.html#183779726">(Dec 18 2019 at 19:01)</a>:</h4>
<p>we intentionally decided not to I think</p>



<a name="183779728"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/187679-t-compiler/wg-parallel-rustc/topic/plan%20to%20test%20parallel%20rustc/near/183779728" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> simulacrum <a href="https://rust-lang.github.io/zulip_archive/stream/187679-t-compiler/wg-parallel-rustc/topic/plan.20to.20test.20parallel.20rustc.html#183779728">(Dec 18 2019 at 19:02)</a>:</h4>
<p>since it's pretty alpha-level</p>



<a name="183783038"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/187679-t-compiler/wg-parallel-rustc/topic/plan%20to%20test%20parallel%20rustc/near/183783038" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> Santiago Pastorino <a href="https://rust-lang.github.io/zulip_archive/stream/187679-t-compiler/wg-parallel-rustc/topic/plan.20to.20test.20parallel.20rustc.html#183783038">(Dec 18 2019 at 19:38)</a>:</h4>
<p><span aria-label="+1" class="emoji emoji-1f44d" role="img" title="+1">:+1:</span></p>



<hr><p>Last updated: Aug 07 2021 at 22:04 UTC</p>
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